DOI: 10.1002/joc.5539
论文题名: Adjustment of measurement errors to reconcile precipitation distribution in the high-altitude Indus basin
作者: Dahri Z.H. ; Moors E. ; Ludwig F. ; Ahmad S. ; Khan A. ; Ali I. ; Kabat P.
刊名: International Journal of Climatology
ISSN: 8998418
出版年: 2018
卷: 38, 期: 10 起始页码: 3842
结束页码: 3860
语种: 英语
英文关键词: bias correction of precipitation
; high-altitude Indus basin
; net mass balance contribution to river run-off
; net snow accumulation adjustments
; precipitation distribution
; precipitation measurement errors
Scopus关键词: Ablation
; Flow of water
; Measurement errors
; Rivers
; Snow
; Bias correction
; High-altitude Indus basin
; Precipitation distribution
; Precipitation measurement
; Snow accumulation
; Uncertainty analysis
; altitude
; climatology
; error analysis
; error correction
; estimation method
; glacier mass balance
; mass balance
; precipitation assessment
; runoff
; snow accumulation
; spatial distribution
; weather forecasting
; Indus Basin
英文摘要: Precipitation in the high-altitude Indus basin governs its renewable water resources affecting water, energy and food securities. However, reliable estimates of precipitation climatology and associated hydrological implications are seriously constrained by the quality of observed data. As such, quantitative and spatio-temporal distributions of precipitation estimated by previous studies in the study area are highly contrasting and uncertain. Generally, scarcity and biased distribution of observed data at the higher altitudes and measurement errors in precipitation observations are the primary causes of such uncertainties. In this study, we integrated precipitation data of 307 observatories with the net snow accumulations estimated through mass balance studies at 21 major glacier zones. Precipitation observations are adjusted for measurement errors using the guidelines and standard methods developed under the WMO's international precipitation measurement intercomparisons, while net snow accumulations are adjusted for ablation losses using standard ablation gradients. The results showed more significant increases in precipitation of individual stations located at higher altitudes during winter months, which are consistent with previous studies. Spatial interpolation of unadjusted precipitation observations and net snow accumulations at monthly scale indicated significant improvements in the quantitative and spatio-temporal distribution of precipitation over the unadjusted case and previous studies. Adjustment of river flows revealed only a marginal contribution of net glacier mass balance to river flows. The adjusted precipitation estimates are more consistent with the corresponding adjusted river flows. The study recognized that the higher river flows than the corresponding precipitation estimates by the previous studies are mainly due to underestimated precipitation. The results can be useful for water balance studies and bias correction of gridded precipitation products for the study area. © 2018 The Authors. International Journal of Climatology published by John Wiley & Sons Ltd on behalf of the Royal Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/116829
Appears in Collections: 气候减缓与适应
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作者单位: Water Systems and Global Change, Wageningen University and Research, Wageningen, Netherlands; Climate Energy and Water Resources Institute, National Agricultural Research Centre, Pakistan Agricultural Research Council, Islamabad, Pakistan; IHE Delft Institute for Water Education, Delft, Netherlands; Earth and Climate Cluster, Faculty of Earth and Life Sciences, VU University Amsterdam, Amsterdam, Netherlands; NUST Institute of Civil Engineering, National University of Science and Technology, Islamabad, Pakistan; Department of Civil Engineering, University of Engineering and Technology, Peshawar, Pakistan; Natural Resources Division, Pakistan Agricultural Research Council, Islamabad, Pakistan; International Institute for Applied Systems Analysis, Laxenburg, Austria
Recommended Citation:
Dahri Z.H.,Moors E.,Ludwig F.,et al. Adjustment of measurement errors to reconcile precipitation distribution in the high-altitude Indus basin[J]. International Journal of Climatology,2018-01-01,38(10)